Knob-lock.



No. 66l,899. Patented Nov. I3, I900. E. WHITTINGHAM.

K N 0 B L 0 C K.

(Application filed Aug. 24, 1899.)

(No Model.)

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ERNEST WHITTINGHAM, OF CHICAGO, ILLINOIS.

KNOB-LOCK.

QPEGIFIGATION forming part of Letters Patent No. 661,899, dated. November 13, 1900.

Application filed August 24, 1899. fieria] Ito-723.369. (No model.)

To all whom it may concern:

Be it known that I, ERNEST WHITTINGHAM, acitizen of the United States of America, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvementsin a Combined Door Knob and Lock, of which the following is a specification.

The present invention relates to that type of door-locks in which the lock mechanism is arranged withinthe door-knob and adapt-- ed to lock the door-knob against a turning action to effect an operation of the latch mechanism and an unlatching of the door and to unlock the door-knob to permit a turning action of the doorknob to attain an unlatching of the door.

The object of the present improvements is to provide a simple, durable, and effective connection between the door-knob and the spindle of the latch mechanism, with which the knob can be operatively engaged with such spindle to effect an operation of the latch mechanism by the turning of the knob and with which the knob can be disengaged from said spindle, so as to prevent an operation of the latch mechanism by the turning of such knob, all as will hereinafter more fully appear and be more particularly pointed out in the claims.

I attain such object by the construction and arrangement of parts illustrated in the accompanying drawings, in Which Figure 1 is a sectional perspective view illustrating the present mechanism in an unlocked position; Fig. 2, a sectional perspective view illustrating the parts in a locked po.- sition.

Similar numerals of reference indicate like parts in both views.

Referring to the drawings, 1 represents the lock-spindle,having the usual connection with the spring-latch bolt 2 and provided with an end hub 3, provided withva peripheral notch or recess 4, as shown in Fig. 1, and adapted to receive a sliding locking bolt or plate, as hereinafter described.

In the present improvement the door-knob comprises a stationary bell-shaped shank portion 5, that may constitute a part of the rose or escutcheon 6 of the door, an outer or cap portion 7, inclosing the lock mechanism, and an inner plate portion 8, turning with said cap portion and constituting a support and guide for said lock mechanism in its movements.

9 is a centrally-arranged keyhole in the cap portion, giving ingress to the key for operating the lock mechanism.

The lock mechanism will comprise a reciprocating locking bolt or piece 10, preferably tumblered in the usual manner andvadapt-ed to alternately engage in the peripheral retion 8 of the knob, as illustrated in Fig. 2.

Any other well-known means for guiding said bolt may, however, be employed without departing from the spirit of this part of my present invention.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is i 1. The combination with the usual springlatch bolt and its operating-spindle, of an end hub secured to said spindle and provided with means for engaging the lock-bolt, a doorknob comprising a stationary shank formed with a lockingrecess and a cap portion adapted to turn upon said shank portion, and a lock-bolt arranged to move within said cap portion, and adapted to have detachable engagement with shank portion of the knob and with the end hub of the spindle, substantially as set forth.

2. The combination with the usual springlatch bolt, and its operating-spindle, of an end hub secured to said spindle and provided with a peripheral notch, a door-knob comprising a stationary shank formed with a locking-recess in line with the notch in the spindle-hub, and a, cap portion adapted to In testimony'whereof Witness myhand this turn upon said shank portion, and a lock-bolt 15th day of August, 1899. arranged to slide Within said cap portion and 1 r 7 adapted to have alternate engagement with ERNESF WHIPIINGHAM' the notch in the spindlehub, and the notch In presence of in the stationary shank portion of the knob, ROBERT BURNS, substantially as set forth. H. K. RIGHTMIRE. 

